Too bad I've read this just now (about the combat log). I've had one of my dwarfs chopping woods outside, and all of the sudden a werehyena appears close to him. I write him off as one of the necessery casualties to save the rest of the fort. While I was appointing everyone to the burrows I did not notice that this dwarf (although he was partially in his civilian clothing) survived for a few moments. Then I've checked his equipment and noticed that he was one of the lucky ones that had the adamantine battle axe. Well... few swings over this beast and the hyena was dead... BUT... my dwarf was wounded... And might I add, he was the only Great warior at that time... well, good thing you can wield battle axe with only one hand cos he was missing the entire left arm.
Anyways... I bring him to my fort, and marked my self one month to build him some confy secluded room. It was simmilar in design like my vamp room, but this time he had to have some food and drinks. Well... one month passed, nothing yet. Two months and BOOM - but not him - another were heyena outside. This time he ran away. Good thing is that he did not notice my king who was stralling outside about 30 blocks away from him. Well.. either that or he saw my Vamp squad of 7 gaining on him (good armor and adamantine weapons). BUT my one-armed dwarf was still there in his room - he did not change, and he still had a missing arm.
Do you think that I can now safelly assume that he was not bitten (maybe hyena scratched him so hard, his arm fell off)?